Revert "Remove icons attribute from Asciidoctor makeprg"

This reverts commit 29a3a7e80446ec8a2a318cddb8b48ed5b30dc044.
Add `profile` with PATH & MANPATH exports

This helps bootstrap my environment between installing MacPorts and fish shell.
Remove tmux-OS X pasteboard interoperability

I've never used this.  It's just a pain to install and configure.
Add Ledger filetype plugin
Revert "Always use a dark background"

This reverts commit 9b407eac52a796402756149dcdab21cea07abab3.